At this time, have become very popular PC A.I.O. But everyone wants them to be not only compact, but also multi-functional. In this project, you can use your computer for everyday work and entertainment.. The most expensive part are the step-less hinge & touch screen , we remove those parts and reduce other unnecessary appearance parts and trans the cost to the panel for better performance & larger size . Just change the position of stand . Only 3 main parts , front cover , back cover and stand , the stand also provide the wall mount holder function . The LED indicator , power switch , audio I/O , USB port can be combined on the same PCB . 21″ display size with PS3 . The hinge is a ratchet design , provide more steps and convenient usability . One can agree with this decision?